Door lock



J.\ KUZMA DOOR LOCK jan., EO, 95@

2 Sheets-Sheet l Filed June l, 1949 NJW INVENTOR. c/QJEPH Naz/PM l ffm.;l

ATTOR/VEX jan. 09 195@ J. KUZMA DOOR LOCK Filed June l, 1949 2Sheets-Sheet 2 INVENTOR. dose/DH //zpw ATTORNEY Patented `an. 10, 1950uNiTED STAT PATENT or FICE@ DOOR LOCK Joseph Kuma, Bellmore, N. Y.Appleatiunirmne 1i, 1949;.senia1fNh-f..9.e,43-9 f 1j1 Claims.. (C1.292,171.65)

This irlventien relabeeeiieprevementeirl-deer locks..

A lock in accordance with, the invention! intended pereuleelr eweeii-.ie de d toeleek the deer eeen-.1er @Bening fromme eue., @were theuse Off the feuieile knee, eltheuea the: deer may be opened imm the@Inside by Hee 0f: er From the' inner' Side the @eef mer be Openeeiieyuse ei the ile-eer 1910.10;

Difeulty vhaai-eeen erleeueltered in Cee@ with. priorl iocvlrsiof` this:type in that-the door. may be opened. by inserting e ihm member-Seekerse.: knife blade er e eelluleisis Strip,- betweenthe doerja-lnb and theedgergi4 the'door, thenimoving. the. ehm member against the meer bei@ef. the mese as-to: push theeboit invvardy toreIease the door.

The present'.4 invention aims to.. overcome. the; foregoing dicultypravdingalocl; Whichmay, beset the lqcled position rrrthequsuaLmafnnzer.by manipulating the locking button onitheedge Q15. the lockhousingf thelock thenpermitL-ngia single inward.movement,` suer-1. as takes plage.during he closing o fthe. @werbe bolt thereafter bemeheldl in areextended @$1510.11 Settim-1.191 furti-1? Hman? movement may behad,.excepting by. turning theA key or the: inside knob.

` Another objecir oi the invention istoprovijd'e improved lock,economical. in construction. cient in operatier1..V anel-I rugged' useThe foregoing, objectives are, accomplished. by. providing Ial'oekhavingmeensadapief to engage; thebelt bi the latch. te' prevent itsinwaremeveff ment, ip he. eng-aging. means. restrained from so, eeeineby aseconddeviee releeeable uperieemee inwardmovement on the latchholt.l

. Other obieeisfend advanteaes ofthe invention will bie apparent. fromthe following. deseripiii'or1A and' from thev accompanying drawingswhich. show, by way of.- example, embodiments. of the invention.

Inthe drawings:

Figure 1 shows a fragmentary View. o fj a door with a lock in accordancewitht'he yinventing; nserted in placje andishown in outline by dottedlines,

Figure 2 is a side View of' the; lock shown in Figure l' with the sidecover removed and wiigh the parte in the unlocked positionera easing.01? heeel' lf,.- end @web y a Y thin @he housing and-.resil 4.9 The:latere .ef release the' me@ @13er lfv 'f-'e O- e deer .bef-.immane a1ere eenreniienalleek betrek .lr6 or. byy turning e deer e edge ef-mehe,4 aeiiueteblr Pesi tiene@ in. eier-.ler-ev keel er eel'eekelveertien, 4

.The e 4ine llamar he Qi deeired Shape airbhouggl-ieiszgre ralelv dewith are tanguar 25:; use@ no epneeaiehe .and pre .J je meKY entry of:diri; end-ehe lik 2:5. also; prende a bearing; ,en ace iqf. one or moreei @hef 19e.. meeheaieel- The heusirie lll be ferme@ with er1. en@ well21a @keineV the heueine; and .Seeereei inV Pesiiiea er ansi? 29;extending @lere-.lieb Suitable apertures:- and` ehr asieelueeee theinner1 Sigles .f the easing .H1 Trie @eval-1.121 ie ereeiurei et" lieende ee indie eared. ai Si en@ er te receive eeewe iefhelldthe..Ileek-iley iien .in the Slet Qi. the deor- Add1. tional; apertures areProvided ifi .the end' wall 2T @or the. loch andi uriiijici-L buttons201 and. 2i and for cre Lei-ieri holt liz.. additional aperture.. is.A

PmVi-ded .i011 a- 190k barrel femmine screw 34 having.. a .letieiiend $5iS used 15e remove ably retenu the leek befr-el' 11F in` position and te'Figure 3' is a view of` the lock" corresponding.

eleve! the line 54:5 of Figure 4.

' a single sloping. Surface for. Contact Wi'ihthe The' letehvbel't'12eme? De eff the' .usuel 'we haveY ina asplltf endV 5.35 With apireie'dreversably f` pprtipn'i' tocontfacttlfe .C'OOr lamb. in aiding the.nwardmevement ei thev latch belt; er the latejfi boit-may be of." famore simpleconsruction having jamb. The'inner end o f the latchbolfbl ygenerally T-shapeci fvevnfor @heireijra thebolt aswill hereinafterappear'. A`,g lv1 1r Sie is sanremo-the race efihe T-Siiped encres. and".slides between" ai pair' @flue members 411? 'amr fil.' axed'tbene wel?1 the Hellsing nordertrrei the latch bolt i2 W je held 1r on agA ti theoutward urging'. of the rin I4 stop.

member@ isaeeehed te' e'ead ,ofthe guide ve Crewe-'exten mel stem 38 inany suitable manner such as by Welding or equivalent construction.

'Ihe latch bolt |2 normally slides inwardly to clear the strike plate asthe door is closed and the opening of the door is accomplished byretracting the latch bolt. This may be done from the exterior of thedoor, when the unlock buttom 20 is depressed, by turning the exteriorknob |1. When the lock button 2| is depressed, the latch bolt mayberetracted by turning the key in the lock barrel I0, or by turning theinside door knob which has its operating stem separate from, butabutting, the stem for the outside door knob.

In order that either the inside or the outside door knobs may actuatethe mechanism'so as to retract the latch bolt, a pair of hub members 44(Figures 2 and 3) and 45 (Figure 4) are provided in an abuttingrelationship, each having extensions respectively identified as 45 and41, and adapted, when turned in the counterclockwise direction tocontact an arm 49 of a pivoted member 50 having a second arm 5I adaptedto engage the inner surface of the T-shaped end 38 of the latch bolt. Aspring 52 normally urges the pivoted member 50 in a direction so as toclear the T-shaped end 38 of the latch bolt.

The hub member 45 for the outside door knob |1 has a notched end 54(Figure 4) adapted to receive the outwardly turned end 55 of theslidable member 56 which is movable between guide members 51 and 58formed in the casing II. The slidable member 55 has another outwardlyturned extension 59 to receive the end of a locking member 60 movablebetween the two outwardly turned extensions 55 and 59. The lockingmember is pivotably mounted as indicated at B2 and is made with a slot64. The locking member 00 also has an extension 05 carrying a springurged detent 56 adapted to engage with a lug 81 so as to hold thelocking member in either one of two positions in which it may be swung.The locking member 6| is swung by reciprocal movement of the lock button2| which has an operating stem 69, having at its outer end the outwardlyturned projection adapted to engage in the slot 54. The operating stem69 is slotted to receive a guiding lug 1I to position it during itsreciprocal movement. The operating stem 69 also has a pair ofprojections 12 and 14 to receive an end of a pivoted member having itsother end extending into notch 16 in an operating stem 11 for the unlockbutton 20. By reason of the movement of the pivoted member 15, as buttonis depressed, the button 2| is moved outwardly and vice versa.

As stated above, the inside door knob, through its hub member 44 isadapted to retract the latch member |2 when the inside knob is turned ina counterclockwise direction. When the inside knob is turned in aclockwise direction, the latch member I2 is retracted by contact of theextension 46 with a projection 19 extending from the side of a pivotedmember 80 in turn having its tip end 8| adapted to move the stop member42. The pivotedkmember 80 is normally urged in a counterclockwisedirection by a spring 82 so as to keep it clear from the stop memberv42.

` In retracting the latch member I2 by means ofY a key, a conventionalbarrel lock plunger 84 is turned against an end 88 of a pivoted member81 having an extension 89 engaging the stop member 42 on the oppositeside from the tip end 8lof the pivoted member 00.'

In accordance with the invention, means are straight walled ends.

provided so that the latch bolt I2 may not be retracted after themechanism has been preset by depressing the lock button 2|, and afterthe latch bolt has been moved inwardly by a single stroke such as wouldoccur in closing the door after the locking button has been set. Thenovel means may be constructed of a base member |00 carrying a lockingmember |0| for the guide stem 39, a restraining member |02 for thelocking member |0|gand apivotablemember |01 adapted to render thelocking means ineffective when the unlock button 20 is in the depressedor unlocked position.

To provide for engagement of the locking member |0| with the guide stem39 of the latch bolt I2, the guide stem is provided with a notch |04(Figure 5) on one side, the notch having The restraining member |02 isadapted to engage with another notch |05 on the back or rear side of theguide stem 39. Thev notch |05 isformed with one wall which may bestraight, while the wall towards the T- shaped end 31 is sloping.

The base member |00 is used to support the locking member IOI and itsassociated parts in a unit for ease in assembling as well as to providea ready conversion unit for the modiiication of existing locks. The basemember is made of thin material and may have any desired outline so asto permit its positioning within the casing without interfering withother parts of the mechanism. The base member |00 carries a guide pin608 and a pivoted member |01 having a downwardly extending arm |08 andan upwardly extending arm |00. At the lower end ofv the base member |00,and positioned about the guide stem 39 Yis a locking member guide |10which has a hollowed out portion to receive the locking member I0| andthe restraining member |02.

j The locking member |01 has a generally U shaped portion, the righthand leg thereof adapted to engage in the locking notch |04 to preventthe reciprocation of the latch bolt l2. The other leg of the lockingmember I0| has an upwardly extending portion carrying a stud I l2 forengagement by one end of the spring |14. The' other end of the spring|I4 is secured by another stud ||5, extending outwardly from the basemember |00. The locking member guide ||0 has a recess on the back sidethereof under the guide stem 39 to receive the restraining member |02which is urged upwardly against the surface of the guide stem 39 by aspring H5. The restraining member 02 has a slight recess on its backsurface to receive one end or" the spring I|6 while its upper suriacerisgenerally U-shaped so that it is retained in,v position by receiving theguide stem 39 between the legs of its U- shaped portion. As the latchbolt is reciprocated, the restraining member |02 is alternatelydepressed and released as the notch |05'passes underneath it. When therestraining member |02 is in the depressed position clearance isprovided for lateral movement of the locking member |0I.

vThe locking member |0I is heldin the unlocked position by an extensionIYI14 Secured to the inner end of the operating stem 110i the button 20,the extension i1 having its inner end formed with a pair of adjacentnotches I9 Vand |20 `adapted to be interposed between the stud |06 andthe side of the hub 0i' the p ivoted member |01. The upwardly extendingarm |09 of the pivoted memoff the extension The inward mrwement4 or' thebutton 20- swings the pivoted member ttl-'Iiv ber-'- Ill-'I` holdingitagainst theaction or the springv ||f'4-, thusv the other leg of theU-shape'd` lockingl member IUI- clears the locking notch |04- inl theguide stern 39; A bar |22' has an aperture to" receive the top of thestud |l2f whilel its other end is slotted as indicated at |23- toYreceive al pin |24 carried by the upper surface ofthe arm 49a The bar|22 is used to assuretheproper alignment of' the locking member lll'lfunder the action ofl its spring llt and also to retract thelv lockingmember under the action of` the innen door knob as will later appear.

ln the operation of the lock, the lock but-ton- 2U| is pressed to presetthe mechanism sotha-t the latch-bolt I2 cannot be moved' inwardlyfromthelocking side of the door-Without the use ofi the key- Therestraining member holds the l'ocking member from acting until a singleinward"- movement of the latch bolt ismade, such as takes place duringthe closing of the door. Inr push-ing the lock button 2| inwardly, theslid-- able member 55 is moved inwardly to-engage the extension 41- ofthe hub membertherebylocking the' outer door knob against rota-tion. Atthe same time, through the movement ofthe pivot'ed'member-l-E, theunlock button 20 is moved' outwardly so that the shoulder` |2'-| or' itsextension releases the upwardly extending arm |09 relieving the pressureor the arm |01 against the memberV |01 which under the urgingof itsspring H4 tends to move over against the guide stem 39. This movement isopposed: by the restraining member |02. Upon the first inward movementof the latch member I-Z'; the restrain-- ing member |82 is depressed bythe sloping-upper end ofthe notch thereby allowing thelock-ing memberlillto move into the locking notch HNL. Further inward movement of' thel'atchboltis` prevented until the lockingA member- Il is renderedinoperative, either by turning the key-in the lock or by turning theinside door knob, In thek event that the inner door knob is turned inthe counterclockwise direction, the extension 46j of" the hub memberlhl'turns-the pivoted member 50'exerting a pull on the guidebar-|-22Which moves the locking member I-l transversely-awayfrom the lockingnotch H14; Further movement of the door knob turns the pivoted v memberv5D clockwise and causes the second arm 5| to corretact" the upper sideofthe 'If-shaped end 38` of the latchbolt withdrawing the latch so that'the door may be opened.

V In the event the door is to be opened by-akey; the rotation ofl thebarrel: against the end 861 of the pivotedmember 8l", causes thepivotedjmember 8T to swing against the locking member'extension moving thelocking memberl |0`i| laterally out of the locking'notch |04;Furthermovement of the barrell mem-ber. 84' causes the extension 89`tocontact the stop member 42`withdrawing the latch bolt so that the doormay be opened. In either case, if the door is allowed to close, thesliding surfaceof the latch bolt pushes it inwardly and resets themechanism so as to prevent further` reciprocation: of' the latcl'lboltunless the locking mechanism is released as d'escribed above;

From the preceding description it will be, seen that the presentinvention provides animplloved lock. which may` not be openedj' by aedge of` the door" in which itl isA installed; 'lslfit'lx lock islreadily actuated intothe locked or un locked position: by moving theusual buttons err the edgeor the lock', the lock permitting one closingoff the door` before its restrainingmeclia'-J nism releases the locking.mechanism to prevent furtherreci-procation1 of the latch bolt.

While the invention hasbeen' described andi illustrated with referencetoa specilic embodif'- menty thereof', ity will be understood that otherembodiments may be resorted towithout departing from the invention. Thelocking mechanismtmaybeincorporated in-locks of other desig-ns2 than thebas-ic construction shownV herein; itV being understood that practicallyall spring' urgenti-bolt locksmay have features of applicant-sg`construction incorporated therein. Alternative eonstr-uctionsmay bemade' within the scope of' the doctrine ot' equivalents, for example,while the* locking and* restraining member have been; described aseng-aging ina notch inthe l'atch'bolt', an equivalent construction mightprovide extensionsl or raised portions for engagement by these-members.Therefore, the form of the in'- vention set out above should beconsideredy as` illustrative and not as limitingthe scope ofthefollowing claims.

I" claim:

I. A lock comprising'a housing', asingle latch bolt'reciprocablewithinthe-housing and'havingarr outer end extendingl therefrom, meansnormall'yf urging the outer end of the latch bolt out"- wardly from thehousing, means restraining the' inward movement' of the latch` bolt, andmeans positionedwholly within the housing rendering saidilast'mentionedmeans ineffective-for asingle n-Ward movement forthe-'atch bolt.

2. A2 lockA comprising a housing, a single latch boltt reciprocablewithin the housing and having an outer end extending therefrom, a springnormally urging the outer end of the latch bolt outwardly from thehousing, a locking member engaging with the latch bolt to restrain theinwardy movement of the latch bolt, a restraining member renderingthelocking member ineiective to restrain theI inward movement of thebolt, and means positioned wholly within the housing rendering4 therestraining member ineffective, said mea-ns operative upon a singleinner movement ofthe bolt'.

3. A lock comprising a housing;` a single latch bolt reciprocable withinthe housing andhaving an outerJ end extending therefrom, a spring'non-lmally` urgingthe outer' end of` the latch bolt outwardly from thehousing, the latch bolt having a.- notched portion, means adapted' to`engage Withthe notched portion to restrain the wardmovement of the latchbolt, and means positioned wholly within the housing rendering saidlast'mentioned means ineiective for a singley inward movement of' thelatch bolt.

4f. A lock comprising a housing, a latch bolt reciprocable within' thehousing and having, an outer endextending therefrom, a spring. normallyurging the outer end of` the: latch bolt outwardly from the housing,thelatch bolt having aA pairof notched portions, a locking membeiadapted to, engage with one of the notched portions ofthe latch bolt' torestrain the inward movement of' the, latch bolt,A anda restrainingmember adapted. to releasably engage the ,loclrifrirf member' t0restrain its` engagement with the latch bolt iis/1.1.1.1r.Vtherestriaining member isY engagedlin'the'vseend Ofthe notched; partijennarrowstrip between Vthe door' lamb and the u' restraining memberadapted. to be moved ou "0f" engagement` with the locking member by thewall of the second notched portion upon an inner, movement of the boltto release the locking memberso that it engages in the first notch torestrain another inward movement of the latch bolt.

5. A lock comprising a housing, a latch bolt reciprocable within thehousing and havngan outer end extending therefrom, a spring normallyurging the outer end of the latch bolt outwardly from the housing, thelatch bolt having avpair of notched portions, a U-shaped locking memberadapted to engage the wall of one of the latched portions of the latchbolt to restrain its inward movement, and a spring urged restrainingmember adapted to engage with one of the legs of the U-shaped lockingmember to releasably restrain it from engaging in the notched portion ofthe latch bolt, the restraining member normally engaged in the secondnotch and adapted to be moved out of the notch by an inner movement ofthe bolt.

6. A lock comprising a housing, a latch bolt reciprocable within thehousing and having an outer end extending therefrom, a spring normally rurging the outer end of the latch bolt outwardly from the housing, thelatch bolt having a pair of notched portions, the first of said notchedportions having a straight wall on its inner side towards the outer endof the latch bolt, the second of said notched portions having a slopingwall on its inner side, a locking member movable transversely of thelatch bolt and adapted to engage with the straight Wall of the rst ofsaid notched portions of the latch bolt to restrain its inward movement,resilient means adapted to urge the locking member against the latchbolt, a restraining member movable transversely of the latch bolt andgenerally perpendicularly to the movement of the locking member andadapted to engage with the locking member to restrain its transversemovement, and resilient means adapted to urge the restraining memberagainst the latch bolt, the restraining member adapted to engage withthe sloping wall of the second notched portion to cause reciprocation ofthe restraining member with reciprocation of the latch bolt, whereby therestraining member is adapted to hold the locking member from engagingthe latch bolt for a single inward movement i of the latch bolt. Y

7. A lock comprising a housing, lock and unlock buttons projecting fromthe side oi the housing, a latch boit reciprocablewithin the housing andhaving an outer end extending therefrom, N

aV spring normally urging the outer end of the latch bolt outwardly fromthe housing, the latch bolt having a pair of notched portions, the iirstof said notched portions having a straight wall on its inner sidetowards the outer end of the latch bolt, the second ci said notchedportions having a sloping wall on its inner side, a locking membermovable transversely of the latch bolt and adapted to engage with thestra-ight wall of the i'lrst of said notched portions of-fthe .latchbolt to restrain its inward movement, resilient means adapted to urgethe locking Vmember against the latch bolt, means operativelylengagingthe locking member to render the locking member ineil'ectivewhenthe unlock buttonzis depressed and eiective when the lock button isdepressed, ar restraining member movable transversely or the latch boltand generally perpendicularly to the movement of the locking member andadapted to engage ,with the lockingmember to restrain its transversemovement, and resilient means adapted to urge the restraining memberagainst the latch bolt, the restraining member adapted to engage withthe sloping wall of the second notched portion to cause reciprocation ofthe restraining member with reciprocation ,oi

the latch bolt, whereby the restraining member.V

is adapted to hold the lockingrmember from engaging the latch for asingle inward movement of the latch bolt.

8. A subcombination for use with a lock including a single latch boltreciprocable within its housing and having an outer end extendingtherefrom comprising a locking member engaging .with the latch bolt torestrain the inward movement of the latch bolt, a restraining memberrendering the locking member ineffective to restrain the inward movementof the bolt, and means positioned wholly within the housing renderingthe restraining member ineffective, said means operative upon an innermovement oil the bolt.

9. A subcombination for use with a lock in; cluding a single latch boltreciprocable within its housing and having an outer end extendingtherefrom and having a notched portion comprising means adapted toengage with the notched portion to restrain the inward movement or thelatch bolt, and means positioned wholly within the housing renderingsaid last mentioned means ineffective for a single inward movement ofvthey latch bolt. l0. A subcombination for use with a lock including alatch bolt reciprocable within its housing and having an outer endextending therefrom, and having a pair of notched portions comprising alocking member adapted to engage with one of the notched portions of thelatch bolt to restrain the inward movement o the latch bolt, and arestraining member adapted to releasably engage the locking member torestrain its engagementwith the latch bolt while the restraining memberis engaged in the second oi'the notched portions, the restraining memberadapted to be moved out of engagement with the locking member by theWall of the second notched portion upon an inner movement of the bolt'to release the locking member so that it engages in the first notch torestrain another inward movement of the latch bolt.

' 1l. A subcombination for use with a lock including a latch boltreciprocable within its hous-` ing and having an outer end extendingtherefrom, the latch bolt having a pair'of notched portions, a U-shapedlocking member adaptedto engage the wall of one of the latched portionsof the latch bolt to restrain its inward movement, and a spring urgedrestraining member adapted to engage with one of the legs or the4U-shaped locking member to releasably restrain it from engaging in thenotched portion of the latch bolt, the restraining member normallyengaged in the second notch and adapted to be moved out of the notch byan inner movement of the bolt.

' JOSEPH KUZMA.

REFERENCES CITED The-following references are of record in the le ofthispaterrt:

UNITED STATES PATENTS

